---
title: "Area code 610: Pennsylvania, United States"
url: "https://lookvalid.com/area-code/610.md"
canonical_url: "https://lookvalid.com/area-code/610"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 610 serves Pennsylvania, United States. Number formats, numbering rules, a live phone validator and the other codes in Pennsylvania."
---

# Area code 610: Pennsylvania, United States

Area code 610 serves Pennsylvania, United States. Number formats, numbering rules, a live phone validator and the other codes in Pennsylvania.

NANPA lists 782 central office codes (prefixes) in use in area code 610, held by 40 holders across 90 rate centers.
Verizon Pennsylvania holds the most prefixes, 322 (41%). 55% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
The FCC unwanted-call data has 3,499 complaints on file for 2,869 numbers in 610, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- In service since: 1994-01-08
- Time zone: Eastern (E)
- Assigned overlays: 484 (1999-06-05), 835 (2022-09-02)
- Prefixes in use: 782
- Pooled prefixes: 433 (55%)
- Rate centers: 90
- Companies holding prefixes: 40
- Assignment dates on file: 2001-03-08 to 2026-02-17 (69 prefixes)
- ZIP codes in its places: 76

## Rate centers

| Rate center | Prefixes | Share |
| --- | --- | --- |
| PHPHSBZN30 | 86 | 11% |
| ALLENTOWN | 71 | 9% |
| READING | 58 | 7% |
| PHPHSBZN28 | 38 | 5% |
| BETHLEHEM | 32 | 4% |
| PHPHSBZN23 | 29 | 4% |
| PHPHSBZN26 | 25 | 3% |
| PHPHSBZN31 | 24 | 3% |
| 82 other rate centers | 419 | 54% |

## Carriers

| Holder | Prefixes | Share |
| --- | --- | --- |
| Verizon Pennsylvania | 322 | 41% |
| Mcimetro Access Transmission Services | 74 | 9% |
| New Cingular Wireless PCS | 56 | 7% |
| Verizon Wireless | 43 | 5% |
| Teleport Communications America | 38 | 5% |
| Level 3 Communications | 36 | 5% |
| 34 other carriers | 213 | 27% |

A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company.

## History

- 1947-01-01: Area code 215, named as the parent of 610 in the NANPA report, was in service.
- 1994-01-08: Area code 610 went into service.
- 1999-06-05: Area code 484 went into service as an overlay in the same area as 610.

## Nearest area codes

The area codes closest to 610, measured between the centers of the ZIP code places they serve, are 445 (about 24 miles), 215 (about 25 miles), 267 (about 25 miles), 609 (about 56 miles) and 640 (about 57 miles).

## ZIP codes

76 ZIP codes fall in places that have a rate center in this area code. The places with the most are Reading, PA (12 ZIP codes), Allentown, PA (8 ZIP codes) and Bethlehem, PA (6 ZIP codes). A ZIP code and an area code are unrelated systems, so a ZIP code can sit in more than one area code and an area code spans many ZIP codes.

## Complaints on file

3,499 complaints for 2,869 numbers. Numbers whose latest complaint falls in each year:

- 2023: 143
- 2024: 120
- 2025: 140

## Questions

### Where is area code 610?

NANPA assigns area code 610 to Pennsylvania, United States.

### In which state does area code 610 sit?

Pennsylvania. 610 is one of 15 area codes the NANPA table assigns to the state.

### Which places does area code 610 cover?

The places with the most ZIP codes among the rate centers in 610 are Reading, PA, Allentown, PA and Bethlehem, PA. The rate center list on this page shows all of them.

### Who owns area code 610?

NANPA assigns area codes. Within 610, Verizon Pennsylvania holds the most prefixes, 322 prefixes or 41%.

### Which time zone does 610 use?

The NANPA NPA report lists the time zone for 610 as Eastern (E).

### What year did 610 enter service?

The NANPA NPA report gives an in-service date of 1994-01-08, so 610 has been in use since 1994.

### Does area code 610 have an overlay?

Yes. 484 (in service 1999-06-05) and 835 (in service 2022-09-02) share the same area with 610, so numbers from all of them are local to each other.

### Which area codes are nearest to 610?

The area codes closest to 610, measured between the centers of the ZIP code places they serve, are 445 (about 24 miles), 215 (about 25 miles), 267 (about 25 miles), 609 (about 56 miles) and 640 (about 57 miles).

### How many prefixes does area code 610 have?

NANPA's report dated 2026-10-17 lists 782 prefixes in service in 610, spread over 90 rate centers and 40 holders.

### Are there complaints about 610 numbers?

The FCC data on file has 3,499 complaints for 2,869 numbers in 610. They are unverified consumer reports. A number with no complaints on file is not proven safe.

Sources: NANPA central office code report dated 2026-10-17; NANPA NPA report dated 2026-10-18; FCC unwanted-call complaints, data fetched 2026-10-17; ZIP code places from GeoNames (CC BY 4.0).